Nam Gi-han To be an Elite

Synopsis:

The main character is a 27 years old civil servant examine, Nam KiHan! One morning after waking up he noticed that he traveled back in time by 16 years! A scenario everyone dreamt of at least once; having the chance to relive your life while retaining all the lessons you learned. Watch as Nam KiHan attempts to relive to become an elite of society! Original webcomic